Of the four fire stream volumes listed below, select the one that is most likely supplied by a single 2-1/2 inch hose.

Of the four fire stream volumes listed below, select the one that is most likely supplied by a single 2-1/2 inch hose.

• A. 75 - 125 gpm
• B. 200 - 500 gpm
• C. 350 - 800 gpm
• D. 125 - 350 gpm

Answer: (D)

A single 2½-inch hose delivers a practical, mid-range flow that’s governed by the nozzle size and the pressure you can put through it. In typical interior attack setups, a single 2½-inch line can supply about 125 to 350 gallons per minute. This range accounts for different nozzle types (smooth-bore vs fog) and common nozzle pressures, along with friction losses in the hose. Flows around the low end (75–125 gpm) would usually come from smaller-diameter hose or a restricted nozzle, not a fully open 2½-inch line. Flows well above 350 gpm (up to 800 gpm) generally require higher-capacity devices or more than one line, such as a larger hose or multiple lines feeding a master stream. So, the most likely flow for a single 2½-inch hose is 125 to 350 gpm.

A single 2½-inch hose delivers a practical, mid-range flow that’s governed by the nozzle size and the pressure you can put through it. In typical interior attack setups, a single 2½-inch line can supply about 125 to 350 gallons per minute. This range accounts for different nozzle types (smooth-bore vs fog) and common nozzle pressures, along with friction losses in the hose.

Flows around the low end (75–125 gpm) would usually come from smaller-diameter hose or a restricted nozzle, not a fully open 2½-inch line. Flows well above 350 gpm (up to 800 gpm) generally require higher-capacity devices or more than one line, such as a larger hose or multiple lines feeding a master stream.

So, the most likely flow for a single 2½-inch hose is 125 to 350 gpm.